[the mozza]

http://i879.photobucket.com/albums/ab352/themozza/gtvrear.jpg

 

[SpiderMJ]

It's a dual exit exhaust (and it could be stainless steel), thats about all you can tell without getting underneath the car.

it could be something like this

Alfa Romeo Shop - Tuning, Styling, Fanartikel und Modellautos - Alfa Spider und Alfa GTV Ragazzon Edelstahl Doppel-ESD 128x80 Ragazzon Edelstahl Doppel-ESD 128x80 32190

 

[itacarboy]

Could be a raggazon, or a costom job, again can't tell until you get under and have a look

 

[elm11g]

more like this one (actually, im quite sure it is this one):

alfisti.net Ragazzon 115x70
as it also has the duplex exhaust cover things from alfisti.net